Temperature-Dependent Luminescent Dye Security Feature
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Solution Overview
Problem
Current security features for objects, such as labels, lack reliable and secure methods to verify originality and protect against manipulation, particularly in ensuring the authenticity of temperature-dependent changes.
Innovation Solution
Incorporating a temperature-dependent luminescent dye with a distinct color change at different temperatures, combined with a temperature-independent luminescent dye, to create a visible and reversible color transition that can be easily recognized, allowing for simple and inexpensive verification using cold spray and UV light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature-dependent luminescent dye is used to create a security feature, then the ability to verify authenticity through temperature-induced color change is improved, but the complexity of the security feature system increases
Solution Approach 1:
The patent applies color changes by incorporating a temperature-dependent luminescent dye that exhibits distinct color loci at different temperatures. When exposed to UV light, the dye changes color based on temperature, providing a visible indicator for authenticity verification. This principle directly enables the security feature to distinguish genuine products from counterfeits through temperature-induced color variation.
Solution Approach 2:
The patent utilizes parameter changes by exploiting the temperature-dependent optical properties of the luminescent dye. The dye's color locus shifts in response to temperature changes, allowing the security feature to respond dynamically to environmental conditions. This parameter change provides a reliable method for verifying authenticity without requiring complex additional components.
2Reliability
If a temperature-dependent luminescent dye is incorporated into the security feature, then the security against manipulation is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent applies preliminary action by incorporating the temperature-dependent luminescent dye into the product during the manufacturing process itself, rather than adding it later. The dye is integrated into the product matrix or applied as a coating before final product completion, ensuring it becomes an intrinsic part of the security feature. This preliminary incorporation simplifies the overall manufacturing process by combining security feature integration with product fabrication.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a reliable and secure means to verify the authenticity of objects by utilizing a temperature-dependent luminescent dye that changes color in response to temperature, while the temperature-independent dye serves as a static reference, enhancing protection against manipulation and forgery.
Implementation Method 1
a temperature-dependent luminescent dye 10, which has a predetermined first color locus F1a in a first state with a first temperature T1 and a second color locus F1b in a second state with a second temperature T2
Implementation Method 2
a temperature-dependent luminescent dye 10, which has a predetermined first color locus F1a in a first state with a first temperature T1
Data Source
Figure 1A~1B
Figure 1C
Figure 2A~2B
AI summary
An arrangement (1) comprises a component (3, 5, 7, 110) and a temperature-dependent first luminescent dye (10), which in a first state has a predetermined first color locus and in a second state has a predetermined second color locus different from the first color locus, and which is arranged on or integrated into the component (3, 5, 7, 110) in such a way that the luminescent dye (10) develops an optically perceptible color change from the first color locus to the second color locus as a function of a temperature change acting upon it.